Drive for motor vehicles



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A. D. ROBBINS DRIVE FOR MOTOR VEHICLES) Filed u ust 6., 19'25 2-Sheets-Sheet 1 '4 TTOR/VEYS Feh w W260 DRIVE FOR MOTOR VEHICLES Filed August 6, 1926 K HM] I v x a} INVENTOR A rromvns v 1,572,903 A. DLROBBINS 2- sheets-sheet 2 fPaiemedFeaie, 19ze.' I I UNITED 1.ST ATESf PATENT OFFICE.

A'zon n. ROBBINS, or NEW YORK, N. Y.,-AssieNoa To INTERNATIONAL Moron comma or new YORK, N. Y., A CORPORATIQN or DELAWARE.

To all'wlzmn it may concern: 2

muvn FOR Moron. ven -ems.

'; "App1icatioi fil ed August 6, 1925. Serial "no. 48,490.

Be it known that I, Azon D. urem a a citizen of the Commonwealth of Australia,

- residing-in the borough of Manhattan, of

the city of New York, inth'e State of New York, have invented certain new anduseful Improvements in Drives for Motor Vehicles; of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof;

This invention relates to drives" for moto vehicles and more particularly to dual" rear axle drives-of the kind in which thefdriving torque from the prime mover is sub-divided and transmitted rearwa'rdly to .the respective" driving axles by separate propeller'. shafts. The invention has for its particular. object to providea' construction wherein the differential-gearing for the respective axles slfall be disposed to one SldBiOf the longitudinal median line of the vehicle whichat the same time shall be practical from the standpoint of manufacture and assembly and disassembly. To this end a dead axle of the banjo type is formed wi yh" a portion of greatest interior dimension offset from the center line of the vehicle and is provided a with an independent passage for one of the propeller shafts. A further object of the invention is to provide a construction which may be readily assembled and disassembled for replacement and repair in a'n'easy and eflicient manner. To this end short shaft sections are dISPOSQdJIl bearings removably connected in the housings'associated with the ,.banjo axles for thh' transmission of driving forces in such manner that the removal of one shaft section may uncover another shaft section to facilitate its removal. These and other objects of the invention and the means for their attainment will be more apparent from the following detailed description of. a preferred embodiment thereof in which:

Figural is a View in plan showing the rear drive according to the present invention as applied to dual rear driving axles. 1 Mr m Figure 2 is alongitudinal vertical sectional view taken in the plane indicated by" the line 2-2 in'Figure 1 and looking in the direction of the arrows.

Figure 3 is a longitudinal vertical sectional view taken inthc plane indicated by the line 33 in Figure l and looking in the direction of the arrows and showing the gearing of the front driving axle.

i I Figure 4 a View showing the banjo axle castii'ig applicable for both forwardly and i'earw'ardly, disposed axles according to the present invention.

$111 the applicat'ion of Gabriel Midboe No.

695,891 dated February 29, 1924, there is disc osed a drive for-motor vehicles. of the dua rear axle type in which the driving torque from the engine is divided by a differential between two rearwardlyi extending propellershafts. The present invention I contemplates the utilization of-a power di viding unit embodying the broad principle "outlined in said patent. From the power dividing unit the driving torque is transmitted rearwardly in equal proportions by the procated in general atd. Both banjo axlestake inform the general shape indicated in' Figure 4. Rearwardly of dead axle 0 there iscarried a housing portion 6 and supported within housing 6 is a hearing support 7 for a short shaft section g connected at its forward end with the universal joint a. Bearingsupport f is substantially cylindrical in form and is formed with a cylindrical seat portion 7 seating in a cylindrical portion a of the housing and prevented from displacement by a flange 7". Ball bearings f are carried with the support f'and withinthese bearings rotates the shaft which carries at its rearward end'a bevel pinion g as will be obvious from an inspection of Figure 3. The shaft is disposed immediately below the live axle c, a portion of the support beingremoved as at f to provide a clearance for the shaft. To one side of the longitudinal median line of the vehicle. and adjacent the side frame member lz; thereof a differential 2' is interposed, the master or ring gear 2" of which meshes with'a pinion j carried upon a transversely extending shaft 3" journaled in ball bearingslc, supported in removable bearing supports Z, on, carried with the housing 6. The shaft j carries at its inner end a bevel gear i adapted to mesh with ltlic bevel pinion 9 whereby driving toruue from the propeller shaft. is trans I Figure 1 it will be observed that the bearing support I is formed with an inwardly extending flange Z, at the inner side thereof and carries an outwardly extending flange Z which may be integral therewith or. threaded thereon and which is adapted to overlie the outer face of the aperturein the housing 0 whereby the hearing may be readily inserted. A cover or cap 6 is provided to elosethe aperture e for the bear ing support. Inwardly the housing a is formed with an opening a closed by a cover plate e through'which the shafts j and g may be removed. Adjacent housing 6 there is formed a. housing portion or cap 0 adapted to form afb earing support for a short shaft 12 passing thr'ough the independent aperture 0 in theba'njo housing which with'the housing e forins the aperture 6 through which the shafts g and 7" maybe removed. A similar housing vQ is illustratedas secured to the different axle forwardly thereof to form a support for the bearing therein.

Rearwardly, of course, the stub shaft p is connected to a universal joint b which in turn is connected to a universal joint by means of a propeller shaft section b, the

universal joint being in turn operatively con-- nected with a short shaft section 1" journaled in bearings 1" in a closure Q carried with the forward end of the banjo (Z. The rear end of the shaft is journaled in bearings 7- carried in a removable bearing support 1 supported in a housing E and the end of the shaft'is covered by a cover plate E. A similar differential whereof the ring gear is indicated at I is provided between the axle sections for the rearwardly disposed axle which are similarly supported in bearings removably earried'by means of the supports E and the ring gear I meshes with a pinion J carried upon a shaft 8 having at one end a bevel pinion s meshing with the.

bearing supports t and L, respectively.

Bearing support L is substantially similar,

in every respect to bearing support Z in the vhousing e and a closure E, is provided for the opei'iing. A closure plate '0 is also provided for an opening formed in housing- 6' through which the shaft 8' is removed.

\Vhat I claim is:

1. In a dual rear axle drive, the combinationwith a pair of rearwardly extending propeller shafts, of housings for the respective axles, short shaft sections journaled in one of the housings and connected with the respective propeller shafts, a transversely extending short shaft carried with the housing, a differential gear, operative connections between the transverse shaft and the differential gear, operative connections between one of the short shaft sections and the driven shaft.

2. In a dual rear axle drive, the combination with a pair of rearwardly extending;

propeller shafts, of housings for the respee tive axles, short shaft sections ourna-led in one of the housings and connected With the respective propeller shafts, a transversely extending short shaft carried with the housng, a differential gear, operative connections between the transverse shaft and the dif ferential gear, operative connections between one of the short shaft sections and the driven shaft, a short shaft section carried with the second axle, operative connections between said short shaft sect 1ons,-a transversely extending shaft journaled in the housing, operative connections between said shafts and op erative connections between said short shaft and differential.

This specification signed this 22nd. day of June, A. D. 1925.

- AZOR D. ROBBINS. 

